Respirator&#39;s blower-filter unit



FIG. 1 is a top plan view of a respirator's blower filter unit showing my new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a top and right side perspective view thereof; and

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a respirator's blower-filter unit, as shown and described. 